One possible development is that Naruto becomes more composed. Minato was calm under pressure, and Naruto could inherit this trait. He might also become more of a loner at first as Minato was often on solo missions. But as he grows, he would learn to balance this solitude with his need for friends. His leadership skills would improve too, as Minato was a great leader.
Well, Naruto would probably become more self - reliant. Minato was known for being able to handle things on his own. This would make Naruto less likely to rely on others for help immediately. He would also develop a more serious side to his personality. His sense of humor might still be there but be more subdued. In his relationships, he could gain more respect from his peers as they see him as more mature, like Minato was, which would further boost his confidence and leadership abilities.
One possible plot development could be Naruto getting into more intense battles with stronger opponents. Since Kenpachi is always seeking strong battles, Naruto may start to do the same. This could lead to him exploring new areas to find worthy foes.
Itachi might start to question his loyalty to the Akatsuki after meeting Minato. Minato's strong sense of justice and love for his village could make Itachi re - evaluate his own actions.
A possible plot development could be that Naruto's new - found Tobirama - like behavior causes some friction within his friend group. His friends might be used to the more carefree Naruto, and this new serious and rule - abiding side could make them feel a bit alienated at first.
One possible plot development could be that Harry begins to undermine the existing power structures at Hogwarts. He might start by sowing seeds of doubt among the students and teachers, just like Aizen did in his own world. Another could be that he forms a secret group of followers who are loyal to him and his new ideals.
Perhaps Harry would try to take over Hogwarts in a more forceful and underhanded way. He might try to oust Dumbledore or other authority figures, using his new - found 'Scar - like' traits. He could also form an unlikely alliance with some of the dark wizards or creatures, thinking that they can help him achieve his power - hungry goals. For example, he might team up with some of the Death Eaters who are still lurking around, which would be a huge shock to the wizarding world.
Naruto would experience a huge shift in his identity. He'd go from being the son of Minato (in the original story) to being Minato's father. This would likely make him more responsible and mature. He'd have to think about protecting Minato and guiding him, which is different from his usual role of being the underdog striving for recognition.
It could be that Naruto is trying to prove himself. He wants to show that he can be as great a fighter as his father. Also, he might have received some training or knowledge transfer from someone who knew Minato well. This could have inspired him to adopt Minato's fighting style. He may also be in a situation where his normal fighting style isn't working, so he turns to Minato's as a last resort.
One possible scenario is when Naruto travels back in time in the fanfiction. He might end up looking like Minato as a result of some time - traveling magic or jutsu side - effect. This could lead to all kinds of interesting situations, like his friends not recognizing him at first.
One possible plot development could be that Minato uses the knowledge of Naruto's past to help him train better. Maybe he reveals some hidden family jutsu or techniques that Naruto can use to become even stronger.
If Naruto looks and acts like Minato in fanfiction, the plot could shift in many ways. Naruto might be more focused on long - term planning and less on impulsive actions. This could change how he approaches the Akatsuki. Instead of charging in head - first, he might set up elaborate traps and strategies. Also, his relationship with Jiraiya could be different. Jiraiya might see more of Minato in him and train him in different aspects, perhaps more on leadership and political acumen.